Metal-working machine



G. SIFKQVITZ METAL WORKING MACHINE March 29, 1927. l 19622,@01

Original Filed Nov.4. 1922 3 Sheets-Sheet l /N VEN TR 560719645 f/0 m72G. SFKOVlTZ METAL WORKING MACHINE March 29, 1927. 1,622,401

Original Filed Nov. 4. 1922 5 Sheets-Sheet 2 l 622 401 Nah 29, 1927. G..SIFKOVITZ 9 y A METAL AWORKING MACHI NE Original Filed Nov. 4, 1922 3Sheets-Sheet :3

Patented Mar. 29, 1927.

PATENT OFFICE.

GEORGE SFKOVITZ, F DETROT, MICHIGAN.

METAL-WGRKING MACHINE. p

Application filed November 4, 1922, Serial No. 599,942. Renewed October16, 1926.

My invention relates to a combined pressing, punching, sawing anddrilling machine.

The objects of my invention are:

1st: To provide a simple and efi'icient machine in one combined. unitfor performing the various operations above indicated for any desiredpurpose.

2nd: More specilically to provide a machine for punching, sawing apartand drilling holes in a rigid automobile wheel rim to convert theV sameinto a collapsible wheel rim of the type shown kand described on patentapplication which was filed on the 16th day of October, 1920, and bears'Serial No. 417,339, which is pending` for broader claims, and CanadianPatent No. 222,974 issued to me.

In the accompanying drawings, Fig. 1, is a side elevation partly insection of the complete machine. Fig. 2 is a rear elevation of the same.Fig. 3 is a plan view of the same. Fig. 4 is a sectional elevationshowing the rstripper for the female die. Fig. 5 is a side elevation ofthe drill; Fig. 6 is afront elevation of the drill; and Fig. 7 is ahorizontal cross section through the press ram` on line 7-7 of Fig. 1.

The whole mechanism is mounted on a pedestal or base 1.

l The press or punch unit comprises a frame 2, provided With a finishedface 3 upon which are set and secured the male die 4 and its associatedparts. The die 4 is secured to a die holder 5 Which rests on the surface3 and is held in place by the bolts 6.

The die holder 5 is provided with a depending T shaped support 7 havinga vertical leg 8 and a horizontal leg 9. The support 7 may be formedintegral with the die holder 5 or made as a separate piece and securedin any desired manner.

Four strippers 10 are provided comprising four vertical rods 11 eachhaving an integral collar 12, adjacent to the under face 13 of the dieholder 5. The rods 11`pass loosely through holes drilled in the dieholder 5 and also in the horizontal leg 9 which two members act asguides for the rods 11.

Each rod 11 is provided with a nut 14 at its lowerl end and a set collar15 at its upper end. A helical spring 16 is placed around each rod 11,its upper end abutting against the collar 12 and its lower end similarlyin contact with the horizontal leg 9.

An opening 17 is formed in the frame 2 to provide space for the stripperparts.

The upper, or female die 13, is ysecured to the press ram 19 which isslidably mounted in vertical guides 20 formed in frame 2.

'.lhe ram 19 is actuated by a screw 21 the lower end of which is a tightfit in a socket formed in the upper end ofram 19.

A worm gear 23 provided with a long hub 24 is journaled in a cap 25,the'latter being secured to the upper portion of frame 2 by four bolts26.

'the interior of gear 23 and hub 24 is provided with a strong screwthread engaging the screw 21 to operate the ram 19.

A.' pair of threaded collars 27 engage ex-y ternal threads on the lowerend of hub 24 and between the upper collar 27 andthe cap a ball thrustbearing 28 is interposed. By this construction a rotary movement of theworm gear 23 imparts vertical motion to the ram 19.

'1`he cap 25 is provided with a pair of bearings 23 in which isjournaled the wormV The above described parts are used to imv part afast motion to ram 19 to bring the die 18 down against the work.

`When this is done the actual punching or` These pins are spaced apartas illustrated` so that as the handle 38 pivots about its connection 38Lwith the handle part 38b in a counter clockwise direction, the band isdrawn tightly about the drum and contin- -ued swinging movement of thehandle in the same direction producesrotation of the drum. The swingingof the handle in the reverse direction releases the band.

For the sawing operation I have provided a metal band saw the same beingmounted. on an upper pulley 51 and a lower pulley 52.

The pulley 52 is mounted on a pin secured to a bracket 54 which isbolted or otherwise rigidly secured to pedestal 1.

The pulley V51 is mounted on a vertically adjustable pin 55 the samebeing clamped between upper and lower set screws 56 in a bracket 57which latter is rigidly secured to trame 2.

At the rear of frame 2 th-ere is mounted a vertically adjustablebracketr which carries a guide roller 50` for the saw 50.

Also at the rear of traine there is formed a pair of bosses or lugs 60in each of which is secured a guide bar 61 i'or supporting the saw table62. The table 62 is provided with four lugs 63 at its lower side, thesame being bored for a sliding lit on guide bars 61.

To drive the saw 50 I provide a hand crank 64 secured to a shaft 65, thesame being mounted in a bearing 66 secured to the frame 2 and a bearing67 secured to pedestal 1.

The shaft carries a sprocket 68 which drives a chain 69 which in turndrives a sprocket 70 secured to the lower hand wheel or pulley 52.

A .small fly wheel 71 may be bolted to pulley 52 as shown in Fig. 2.

The shaft 65 carries a sprocket 72 which drives a chain 73 passingaround a sprocket 7 4 loosely mounted on a pin 75 the latter being linedto frame 2. Y

A small Vgear 7 6 is also loosely mounted on pin 75 and is fastened tothe sprocket 74.

The gear 7 6 drives a gear 77 mounted on the table feed screw 73 whichis journa-` at one end in a bearing 7 9 termed in frame 2 and at theother end in a bearing 80 depending rom saw table 62.

A small hand wheel 31 is mounted on the upper end ot a vertical screw 82which operates through a hole tapped in saw table. The screw 32 carriesat its lower end a halt nut 63 which engages the feed Iscrew 73.

A flange 84 on table 62 is provided Ytor squaring the work and thisflange has a slot 85 to clear the saw.

The work may be clamped on saw table 62 in any desired manner; then bythe operation of the hand crank 64 and the connected gearing justdescribed the saw is driven and the work fed to it to make the cut.

Referring again to the pressing action, on account ot the female diebeing on top with `no outlet, for the punchings, the saine may besatisfactorily ejected by the following mechanism:

A hole 100 is drilled through the die 18 and a pin 101 is loosely ittedto move vertically in this hole.

The pin 101 is provided with a keyway or slot 102 with closed ends and aset Iscrew 103 tapped through ram 19 has its point engaging the slot 102in such a manner that the pin 101 has a free but limited verticalmotion.

A guide bracket 104 is bolted to ram 19 and tornis a guide for theejector bar 105.

A lever 106 is pivoted by a pin 107 to the bracket 104 at one end andhas its other end resting on the upper end ot the ejector pin 101. j

On the down or punching strokeV of ram 19 the separated material isforced up into the female die 18 and sticks there. On the up or idlestroke o1 ram 19 the ejector bar 105 is carried up with the ram untilits upper end strikes the projecting under surlace olf cap 25. l

The further upward motion o ram 19 produces pressure of the ejector pin101 on the punching and ejects it. V

For drilling l provide a drill press constructed and mounted as follows:

A lower bracket 125 is provided with a hole 126 which tits the guide bar61.

An upper bracketv 127 has a flange 128 which is bolted to the upperportion of frame 2.

The brackets 125 and 127 are connected by a standard 150 which carriesthe table 129.

A spindle 130 is mounted in bearings 131 and 132 and driven throughbevel gears 133 and 134, by a hand crank 135, all otusual construction.j

The spindle 130 may be fed vertically by a hand lever 136. i

The table 129 is pivoted vertically by a pin 137 mounted in a swivelbracket 138 which is connected to a clamp bracket 139 which latter isclamped to the standard 150.

The swivel bracket 138' is connected to the clamp bracket 139 by bolts140 extending through slotted holes 141 in such a manner that the table129 may be tilted.

While I have shown all the motions in the above described machine asbeingoperated by hand it will be obvious that power may be easilyapplied to any or all of them if desired; and, further, while themachine as shown is designed `and intended 'for light work it mayobviously be made as heavy as desired. l

I therefore desire to claim and hold as mine all the patentable subjectmatter cov-V ered by the following claims:

1. In a machine of the class described, `a support for a piece of work,a stationary' die, a movable rain, guidesv for the rain, a die carriedby therain, a screw to raise and lower the ram, a driven shaft coupledwith the screw to rotate the same, a drivin-g shaft coupled with thedriven shaft to `rotate the driven shaft, a drum mounted on the drivenshaft, a pivotally mounted lever having a frictional band encircling thedrum to be tightened thereabout to rotate the same as the lever isactuated.

2. In a machine of the class described, a support for a piece of work, astationary die, a movable ram, guides for the ram, a die carried by theram, a screw to ralse and lower the ram, a worm gear having a threadedhub engagmg the screw, a bearing for the hub of said gear, a worm shaftto drive the gear, an ejector mounted within the ram extending throughthe die carried thereby, a lever pivoted to the ram guides having itsfree end engaging the ejector to be raised by the movement thereof, aplunger carried by the ram to be lifted therewith, said plunger engagingthe bearing for the hub to limit its upward movement and engaging thelever to limit its upward movement to hold the ejector downwardly as theram travels upwardly.

3. In a machine of the class described, a stationary die, a ram, a diecarried by the ram, driving means coupled with the ram to rapidly raiseand lower the same, auxiliary driving means coupled with the Vram toactuate the same downwardly, comprising a driven shaft coupled with theram having a drum mounted thereon, and a pivotally supported leverhaving a friction band engaged about the drum to be tightened thereaboutto rotate the same upon actuation of the lever.

In testimony whereof I he-reunto affix my si gnature.

GEORGE SIFKOVITZ.

